Homework Sourse6 A fair coin is tossed three times What is the probability
____________6. A fair coin is tossed three times. What is the probability of obtaining one Head
and two Tails? (A fair coin is one that is not loaded, so there is an equal
chance of it landing Heads up or Tails up.)
A) ¼ B)1/3 D) 4/8 B) 3/8
____________7.Which of the following is not a valid probability value?
A) 0 b) 0.57 c) 11/13 d) 4/3
____________8. Which of the following is a correct statement about probability?
A) Probability values range from 0 to 1, inclusive.
B) Probabilities may assume negative
D) Probabilities are limited to one decimal place
____________ 9. The interquartile range is the difference between:
a. the second and third quartile. b. the second and fourth quartile.
c. the first and third quartile. d. the first and last quartile.
____________10. A contingency table :
a. can only be used when there are two levels of each variable.
b. can be used to study the relationship between ordinal or nominal level variables.
c. can only be used with interval or ratio level variables.
d. is constructed from the quartiles of a data set..
____________ 11. A dot plot shows the range of values along the:
a. vertical axis. b. ( x, y ) diagonal axis.
c. median axis. d. horizontal axis.
____________12. A scatter diagram is a graphic tool used to portray:
a. the mean of the data values. b. the range of the data values.
c. the midpoint of data values. d. the relationship between variables.
____________13. In a stem and leaf display:
a. the leaf is the leading digit or digits of the number.
b. the stem is the leading digit or digits of the number.
c. the stem or the leaf can be the leading digit or digits of the number.
d. the stem is the trailing digit.
____________14. A committee of three is chosen from among the five professors – Dr. Smith,
Dr. Andrews, Dr. Joalvz, Dr.Fritz and Dr. Burke. What is the probability that
Dr. Burke is on the committee? Show solution.
A) 1/5 B) 2/5 C) ½ D) 3/5
____________15. A fair coin is tossed three times. What is the probability of obtaining one
Head and two Tails? (A fair coin is one that is not loaded, so there is an equal chance of it landing Heads up or Tails up.) Show solution.
A) ¼ B)1/3 D) 4/8 B) 3/8
Exercise 1. Select the correct answer and write the appropriate letter in the space provided. If there is a need for computed answers, solve and write the correct answers from your computed values in the blanks provided 1. You observe 1000 leaves falling from a tree and record whether they land with their top or bottom showing and find that 583 or 58.3% land with their bottom showing What approach to probability does this represent? A) A priori probability B) Subjective probability C) Empirical probability 2. Which of the following is not a valid probability value? A) 0 b) 0.57 c) 11/13 d) 4/3 3. If you are trying to determine whether a leaf will fall with its bottom side showing (event A), what is the collection of events that are \"not A\" called including leaves landing with the tops showing, leaves landing on their sides, and any other possible outcomes? A) Event B Sample space C. Complement of event A D.Joint events 4.Which of the following is a correct statement about probability? A) Probability values range from 0 to 1, inclusive B) Probabilities may assume negative values C) Probabilities may be greater than 1 D) Probabilities are limited to one decimal place S. The Special Rule of Addition is used to compute A) the probability of two or more independent events B) the probability of two or more mutually exclusive events C) the probability of two or more collectively exhaustive events D) subjective probabilitiesSolution
1 b. Empirical 2 d)4/3 since >1 3 c) complement of A 4) A) P ranges from 0 to 1 5) A) two independent events 6) d) 3/8 7) d)4/3 8) A 9) c) I and 3rd quartile
